Android Open Source - AudioPlayerRecorder Audio Recorder Microphone

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From Project

Back to project page AudioPlayerRecorder.

License

The source code is released under:

MIT License

Java Source Code

package com.heavyplayer.audioplayerrecorder.widget;
// w  ww. j av a  2 s. c  o  m
import android.content.Context;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.os.Build;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.ScaleAnimation;
import android.widget.ImageView;
import com.heavyplayer.audioplayerrecorder.R;
import com.heavyplayer.audioplayerrecorder.widget.interface_.OnDetachListener;

public class AudioRecorderMicrophone extends ViewGroup {
  private static final float MAX_RELATIVE_SCALE = 0.8f;
  private static final int MAX_AMPLITUDE_DEFAULT = 20000; // Real maximum value for MediaRecorder.getMaxAmplitude() is Integer.MAX_VALUE.

  private ImageView mMicrophoneView;
  private View mBackgroundView;

  private int mMaxAmplitude = MAX_AMPLITUDE_DEFAULT;

  private float mCurrentAnimationScale = 1.0f; // In the beginning, the background view has the same size as the microphone view.

  public OnDetachListener mOnDetachListener;

  public AudioRecorderMicrophone(Context context) {
    super(context);
    init();
  }

  public AudioRecorderMicrophone(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
  }

  public AudioRecorderMicrophone(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init();
  }

  private void init() {
    mMicrophoneView = new ImageView(getContext());
    mMicrophoneView.setImageDrawable(getResources().getDrawable(R.drawable.vs_micbtn_on_selector));
    // Center microphone, since the drawable is closer to the top.
    mMicrophoneView.setPadding(
        0,
        (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2, getResources().getDisplayMetrics()),
        0,
        0
    );

    mBackgroundView = new View(getContext());
    final Drawable circleDrawable = new ShapeDrawable(new OvalShape());
    circleDrawable.setAlpha(85);
    circleDrawable.setColorFilter(Color.GRAY, PorterDuff.Mode.SRC_ATOP);
    if(Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN)
      mBackgroundView.setBackgroundDrawable(circleDrawable);
    else
      mBackgroundView.setBackground(circleDrawable);

    // Background below microphone.
    addView(mBackgroundView);
    addView(mMicrophoneView);
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    // Measure microphone.
    measureChild(mMicrophoneView, widthMeasureSpec, heightMeasureSpec);
    final int microphoneMeasuredWidth = mMicrophoneView.getMeasuredWidth();
    final int microphoneMeasuredHeight = mMicrophoneView.getMeasuredHeight();

    // Measure background to be the same size as the microphone.
    final int circleDiameter = Math.max(microphoneMeasuredWidth, microphoneMeasuredHeight);
    measureChild(
        mBackgroundView,
        MeasureSpec.makeMeasureSpec(circleDiameter, MeasureSpec.EXACTLY),
        MeasureSpec.makeMeasureSpec(circleDiameter, MeasureSpec.EXACTLY));

    final int width, height;
    final LayoutParams lp = getLayoutParams();
    // Calculate width.
    if(lp != null && lp.width == LayoutParams.MATCH_PARENT)
      width = MeasureSpec.getSize(widthMeasureSpec);
    else
      width = (int)(circleDiameter * (1.0f + MAX_RELATIVE_SCALE) + .5f);

    // Calculate height.
    if(lp != null && lp.height == LayoutParams.MATCH_PARENT)
      height = MeasureSpec.getSize(heightMeasureSpec);
    else
      height = (int)(circleDiameter * (1.0f + MAX_RELATIVE_SCALE) + .5f);

    // Set dimensions; respect the contract.
    setMeasuredDimension(width, height);
  }

  @Override
  protected void onLayout(boolean changed, int l, int t, int r, int b) {
    layoutChildViewAtCenter(mMicrophoneView, l, t, r, b);
    layoutChildViewAtCenter(mBackgroundView, l, t, r, b);
  }

  private void layoutChildViewAtCenter(View view, int l, int t, int r, int b) {
    final int measuredWidth = view.getMeasuredWidth();
    final int measuredHeight = view.getMeasuredHeight();
    final int left = (int)(((r - l) - measuredWidth + .5f) / 2);
    final int top = (int)(((b - t) - measuredHeight + .5f) / 2);
    view.layout(left, top, left + measuredWidth, top + measuredHeight);
  }

  public void setMaxAmplitude(int amplitude) {
    mMaxAmplitude = amplitude;
  }

  public void updateAmplitude(int amplitude, int duration) {
    final float oldScale = mCurrentAnimationScale;

    // Calculate new scale.
    final float relativeScale = Math.min(amplitude, mMaxAmplitude) / (float)mMaxAmplitude;
    mCurrentAnimationScale = 1.0f + (relativeScale * MAX_RELATIVE_SCALE);

    // Transition from old scale to new scale during the update interval.
    mBackgroundView.clearAnimation();
    final Animation animation = new ScaleAnimation(
        oldScale,
        mCurrentAnimationScale,
        oldScale,
        mCurrentAnimationScale,
        Animation.RELATIVE_TO_SELF,
        0.5f,
        Animation.RELATIVE_TO_SELF,
        0.5f);
    animation.setFillAfter(true);
    animation.setDuration(duration);
    mBackgroundView.startAnimation(animation);
  }

  @Override
  protected void onDetachedFromWindow() {
    super.onDetachedFromWindow();

    if(mOnDetachListener != null)
      mOnDetachListener.onDetachedFromWindow(this);
  }

  @Override
  public void onStartTemporaryDetach() {
    super.onStartTemporaryDetach();

    if(mOnDetachListener != null)
      mOnDetachListener.onStartTemporaryDetach(this);
  }

  public void setOnDetachListener(OnDetachListener listener) {
    mOnDetachListener = listener;
  }
}

Java Source Code List

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